PATROL BASE YAZZIE, Afghanistan — I’ve been meaning to do this blog entry for quite some time, but, well, I figured we should get to know each other a bit before diving in. In my newly educated estimation, one of the things Americans take for granted the most is their plumbing. Fresh, crisp running water is a beautiful thing, whether it’s used for bathing, drinking or flushing the toilet. Flushing the toilet, you ask? Oh, yes, compadres. This is a blog entry about what happens when you no longer have that option. And since this blog is devoted in part…